Hearing in Detroit on suit against ex-prosecutor

DETROIT -- A former federal prosecutor in Detroit is claiming immunity in a civil lawsuit filed by a man who was accused of aiding terrorists.

Karim Koubriti was convicted of conspiracy in 2003, but the case was overturned because of prosecutorial misconduct. Some documents that could have helped the defense were not shared.

Koubriti is pursuing ex-prosecutor Richard Convertino and others with a lawsuit, seeking $9 million. U.S. District Judge Marianne Battani has scheduled a hearing Friday to hear arguments about whether the civil case should go forward.

In court filings, Convertino says he's immune to the lawsuit, based on very technical legal points.

In 2007, he and a State Department investigator were acquitted of conspiring to hide evidence in Koubriti's criminal case.